Brake-rod jaw



F. SCHAEFER.

BRAKE ROD MW.

APPLICATION man JULY 10,1919.

Patented Apr. 4, 1922.

FlB.1-,

R 0 T N E v m WITNESSES UNITED ST T S PATENT, oFF cE.

FREDER IG SCHAF-FER, OE'PITTSBURGH, PENNSYLVANIA.

BRAKE-ROD JAW.

iA'iLSWS.

- Application filed July 10,

T all whom it may concern:

Be it known that I, Fnnnnnic Scrmnrnn, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Brakeltod Jaws, of which the following is a specification.

This invention relates to brake rod jaws and is an improvement upon my Patent No. 1,259,676 of March 19, 1918. The-object of the improvement is to provide a brake rod jaw which can be more easily assembled with the brake rod than the oneof the aforesaid patent, and in which integral means are provided for positively engaging the free end of the hook on the brake rod to positively hold said hook against opening up even under abnormal strains. 7 i

In the accompanying drawings Fig. 1 is a plan view ,of the jaw with the brake rod attached thereto; Fig Qis a side view thereof showing in dotted'lines the wings prior to bending to final form; Fig. 3' is longitudinal section therethrough on the line 3- -3,,Fig.1; and Fig. d is a transverse view on the line Jr-4i, Fig. 3.

The jawisformed from a singlepiece of metal preferably a rolled plate of rectangular outline, although if desired the plate may be sheared somewhat to the form of the blank to whi'chit is forged. This plate is then subjected to the action of suitably formed dies which trim it out and shape it, the same having the two legs or j aw bers 1 and2 provided at their free ends with the pin eyes 8, and at their otherends being joined to the web portion 4. which maybe bent downwardly or slightlyconcaved on its upper surface. The extreme end portionof the plate or blank is pressed upwardly, forming an upwardly bowed portion 5, whose inner edge, inthe method of forming, is connected tothe outer end of the web portions 1, by a thin inclined web which is afterwards punched out to form the space or hole 7. In the diebperation the excess, metal from the trimmed out or cut away portions is caused to'fiow'into the blank so as to form thickened portions at certain points, to add strength and filling or spacing portions where required.

For example, the metal around the pin eyes 3 is caused to flow in bothdirections, forming a broadened bearing 8 for the connecting pin; the edges ofthe jaw portions 1 and 2 are also thickened or flanged as at Specification of Letters Patent.

1919. Serial No. 309,916.

10, to strengthen these members; and the metal between the two limbs or jaw members 1 and 2. is in part forced intothe web portion l, providing bosses. or protuberances 11 and 12, respectively on the upper and lower faces of the web portion 4, and providing a thickened edge for the brake rod hook at that point. The web portion 4 is inclined slightly toward its outer end, as shownin Flgs. 2. and 3, and on the bottom face at its outerend is provided with a bossthickened portion 13 forming a bearing forthe brake rod. The outer upwardly bowed portion 5 will preferably be provided on both edges withwings 14s and 15, which areof considerable length and having their adjacent edges beveled as indicated in Fig. 1 so that when,

bent around the brake rod they will lap past eachother. I 1

The blank is forgedinthe flat and afterwards the jaw members ,1 and 2 are bent out of the plane in which they lie into substantially parallel planesat right angles to the original plane.

The brake rod 17 isassembled with the jaw in the following mannerz-The end of said rod, after heating, has its end bent backwardly upon itself to form an open hook but with the free end 18 of the hook separated from the body of the rod fora distance at, least equal to the thickness of the portions 11 and 12. This hook is then entered between the two limbs 1 and 2, with the body of the rod lying below the web portion. 4, and (said rod and jaw are then moved longitudinallylof each' otherto cause the web 4 to enter into the hook, and by means of a hammer-or the like the end 18 of the hook is closed downwardly until it can enter the hole 7 between the web A: and the upwardly bowed portion 5, and is forced. through said hole until the root or inner curve of the hook takes bearing against the rounded portions 12 and 13, on the in ner end of the "web. The two wings 14, 15 are then bent downwardly, in opposite directions, around the body of the rod lapping past each other asshown to securely bind the hookedendof the rod in place.

In the improved'jaw the center line of Patented r. 4, 1922 integral portion with the jaw itself) enages the free end of the hook and there ore holds said free end securely against opening up. Consequently the hook is not liable to fail even under abnormal strains. The thickened portions 11, 12, at the inner end of the web provide an ample bearing for the hook, and the lug 13 on the lower face of the web at its outer end, to ether with the lug 12 at the inner end of sai web, tend to keep the jaw in exact alignment with the center line of the brake rod, so that there can be no twisting movement and no oblique straightening under the stresses in abnormal use.

In the forging of the blank a thin web joining the inner edge of the upwiardly bowed portion 5 and the outer end of web 4 is always left, and this is afterwards punched out to form the hole 7. This hole therefore can be punched to various sizes, 50 asto adapt it to the diameter of the particular brake rod to be utilized, and therefore giving a relatively tight fit of the free end of the book of the brake rod in said opening, so that there is no substantial l'ost motion here which might have a tendency to allow the hook to have an initial opening or bendingmovement under abnormal stress. Furthermore, the slight flange 20 left around the hole 7 after punching out said thin web, forms points of contact with I the free end of the hook and further assists in preventing the'starting of any opening movement of the hook.

The jaw described can be very readily formed by a die forging operation from a flat blank, without excessive waste of metal, and at a minimum labor cost. time is can be'made of ample strength in all parts.

1. In combination, a brake rod jaw composed of wrought metal and comprising jaw members lying side by side and united by a transverse web portion serving as a means for connecting a hooked brake rod end and having an upwardly bowed portion extending from said web portion and having a hole therein, and a brake rod having a hooked end'enga ing said transverse web portion and with t e body of the rod lying against one face of the said web portion and the free end of the hook entering the hole in said upwardly bowed portion;

2. In combination, a brake rod jaw composed of wrought metal and comprising jaw -members lying side by side and united by a transverse web portion serving as a means for connecting a hooked brake rod end and having an upwardly bowed portion extending from said web portion and providing a hole therein, a brake rod havinga hooked end engaging said transverse web portion and with the body'of the rod lying against At the same one face of the said web portion and the a free end of the hook entering said hole, and

a wing integral with said upwardly bowed ortion and arranged to be bent around the )ody of the rod.

3. In combination, a brake rod jaw composed of wrought metal and comprising aw members lying side by side and connected by a transverse web portion having 11 wardly and downwardly projectin roun ed lugs at its inner end formin a t ickened bearing for engagement wit a hooked brake rod and having outwardly from said web portion an upwardly bowed portion, and a brake rod having a hookedend engaging the thickened bearing end of said web portion, with its body lying against one face of said web portion and its free end entering the space between the end of said web and the upwardly bowed portion.

4. In combination, a brake rod jaw composed of wrought metal and comprising jaw members lying side by side and connected by a transverse web portion having upwardly and downwardly projecting rounded lugs at its inner end forming a thickenedbearing for engagement with a hooked brake rod and having outwardl from said portion an upwardly bow ortion, and a brake rod having a hooked end engaging the thickened bearin end of said webportion, with its body lying against one face of said web portion and its free end entering the space between the end of said web and the upwardly bowed portion, and a wing integral with the upwardly bowed portion and arranged to be bent around the body of said rod.

5. A brake rod jaw composed of wrought metal and corn rising jaw members lying side by side an connected by a transverse web portion inclined from its inner to its outer end and provided at its inner end with upwardly and downwardly projecting bosses forming rounded thickened bearing for a brake rod hook and at its outer end with a downwardly projecting lug in substantial alignment with the downwardly projectin lug at its innerend, said jaw at its outerend having an upwardly bowed portion spaced from said transverse web portion and arranged to receive the free end of'a brake rod hook.

6. A'brake rod jaw composed of wrought metal and comprising jaw members lying side by side and connected by a transverse web portion inclined from its inner to its outer end and provided at its inner end with upwardly and downwardly projecting bosses forming a rounded thickened bearin for a brake rod hook and at its outer en with a. downwardly projecting lug in subportion spaced from said transverse web portion and arranged to receive the free end of a brake rod hook, and a wing integral with the upwardly bowed portion and arranged to be bent around the brake rod.

7. In combination, a brake rod jaw composed of wrought metal and comprising jaw members lying side by side and connected by a transverse web portion inclined from its inner to its outer end and provided at its inner end with upwardly and downwardly projecting bosses forming a rounded thickened bearing for a brake rod hook and at its: outer end with a downwardly projecting lug in substantial alignment with the downwardly projecting lug at its inner end, said jaw at its outer end having an upwardly bowed portion spaced from said transverse web portion, and a brake rod having a hooked end engaging the thickened bearing on the transverse web portion and having its body bearing against the downwardly projecting lugs on said portion and its free end extending into the said space.

8. In combination, a brake rod jaw composed. of wrought metal and comprising jaw members lying side by side and connected by a transverse web portion inclined from its inner to its outer end and provided at its inner end with upwardly and downwardly projecting bosses forming a rounded thickened bearing for a brake rod hook and at its outer end with a downwardly projecting lug in substantial alignment with the downwardly projecting lug at its inner end, said jaw at its outer end having an upwardly bowed portion spaced from said transverse web portion, a brake rod having a hooked end engaging the thickened bearing on the transverse web portion and having its body bearing against the downwardly projecting lugs on said web portion and its free end extending through said space, and a wing integral with the upwardly bowed portion and arranged to be bent around the bodyof said brake rod.

In testimony whereof, I have hereunto set my hand.

FREDERIC SGHAEFER.

\Vitness G. G. TRILL. 

